Aeroplane-style black boxes should be fitted by law in every new car to help police, courts and vehicle manufacturers determine how accidents are caused, a Midland MP has said.
An on- board computer would record speed, engine revolutions per minute, and the exact positions of the accelerator and brake pedal.
The proposal was put forward by MP Rob Marris (Lab Wolverhampton South West) during a debate on the Government's new Road Safety Bill.
Information about safety, such as the vehicle's speed, was already recorded by computers which controlled air bags or anti-lock braking systems, he said.
Courts should be allowed to use this data in cases where someone had been injured, he said.
Transport Minister David Jamieson said: "Such technology would offer benefits in research and accident reconstruction, but it may be viewed as unacceptably intrusive with respect to the driver."